Gfiinding ob facing machine



(No Model.) 3 Sheets-Sheet 1. L. L. LAMB. GRINDING 0R FACING MACHINE.

No. 526,238. Patented Sept. 18, 1894.

I NORRIS PETER$ cg, Wore-urn 172 vein b1 3 Sheets-Sheet 2.

Patented Sept. 18, 1894.-

AIME:

L. L. LAMB. GRINDING 0R FACING MACHINE.

I I I (N0 I/Iodel.)

3 Sheets-Sheet 3.

(N0 Modem" L. L. LAMB. GRINDING OR FACING MACHINE.

'No. 526,238. Patented Sept. 18, 1894.

TIQGze (5Q.

I of parts hereinafter described and. pointed have invented certain newand useful Imfull, clear, and exact description of the invenpockets ofthe work-holding-plate, and Fig. 9

Nita ms LEVI L. LAMB, OF AKRON, OHIO, ASSIGNOR TO THE WHITMAN & BARNESMANUFACTURING COMPANY, OF SAME PLACE.

GRINDING OR FACING MACHINE.

' SPECIFICATION forming part of Letters Patent No. 526,238, datedSeptember 18, 1894;.

Application filed June 25, 1894- To all whom it may concern.- V

Be it known that I, LEVI L. LAMB, ofAkron, in the county of Summit andState of Ohio,

provements in Grinding or Facing Machines; and I do hereby declare thefollowing to be a tion, such as will enable others skilled in the art towhich it pertains to make and use the same.

My invention relates to improvements in grinding or facing machines,more especially designed for facing the knife-sections ofharvesting-machines; and it consists in certain features of constructionand in combinations out in the claims.

A preferable construction of machine embodying my invention isillustrated in the accom panying drawings, wherein Figurel is a topplan, and Fig. 2 is a front side elevation of the same,portions being insection to more clearly show the construction, and portions being brokenaway to reduce the size of the figures. Fig. 3 is a side elevation ofthe chuck employed to carry the grinding or facing-stone or substance,and Fig. 4 is an elevation of the back side of said chuck. Fig. 5 is aside elevation of the work-holding-plate employed to carry the sectionsof work during the grinding or facing operation. Fig. 6 is an elevationof the face of said plate, and Fig.7 is an elevation of the back oftheplate. Fig. 8 is an enlarged elevation in detail showing the faceside of one of the plates employed in the formation of thesection-receivingis an edged view of the same, looking in the directionof the arrow in Fig. 8. Fig. 10 is a side elevation of a portion of themachine, partly in section, and enlarged relative to the correspondingparts exhibited in Figs. 1 and 2, to more clearly show the construction.Fig. 11 is an elevation, in detail, of the connection between crank J 3and ratchet-wheel K;

Referring to the drawings'A designates the facing or grinding-stone thatis operatively connected in any suitable manner with the driving-shaftB, a preferable manner of supporting said stone being shown in Figs. 1and 2, wherein the same is secured by means Serial 110,515,558. (Nomodel.)

of set screws, (it, within a chuck, C, operatively mounted in anysuitable manner upon the driving-shaft, said chuck having a rim providedwith screw-threaded perforations for receiving the securing-screws,several of said screws being preferably provided at equal intervalsapart. Chuck C is shown detached in Figs. 3 and 4. i

The driving-shaft is journaled in suitable boxes I) that are supportedfrom standards I) suitably secured to a supporting-frame, D, or to thefloor of the shop wherein the machine is operated, the driving-shaftbeing provided with a driving-pulley B. The driving-shaft isintergeared, as at E, (see Figs. 1 and 2) with a short shaft, F, that issuitably supported and arranged below and parallel with thedrivingshaft. (See Fig. 2.) Shaft -F, in turn, is intergeared, as at F,with a shaft G, that is snitably supported a suitable distance below andforward of and arranged parallel with the at g, with a shaft, H, thathas bearing in suitable boxes h rigid with standards h suitably securedto the supporting-frame.

Upon shaft H is operatively mounted the work-holding-plate that isadapted to receive or carry the sections or work to be ground or faced.The work-holding-plate is shown detached'in Figs. 5, 6, and '7, thatexhibit a preferable construction of the same, the'construction showncomprising a large circular plate I that is provided with a hub I andreinforcing ribs 1 on its back side, which reinforcing ribs 'extend fromthe hub in a radial direction to near the outer edge of plate I as shownin Figs. 5 and 7.

Secured to the face and near the edge of v the plate I and arranged inthe form of a polygonal figure and concentric with the axis of theplate, is a series of plates 1 adjacent lates l abutting each other attheir adja- P recesses being open at the respective ends of the platesand the recesses in the contiguous ends of adjacent plates registeringwith each other so as to form pockets 1 that are too adapted to receivethe sections or work to be ground or faced,-the form of saidpocketsbeing such as to nicely receive the work, and the depth of the pocketsbeing such that the Work shall project outside of or protrude somewhatat the face of the chuck-plate. Briefly described, one-half of pockets 1is formed in each of adjacent plates 1 By means of the gearinghereinbefore described the driving-shaft and shaft H, the grinding orfacing substance and sections to be faced or ground are revolved inopposite directions, respectively, and the arrangement of parts is suchthat the work-holding-plate shall overlap the one side of the face ofthe grinding or facing-stone, as shown in Fig. 1, and so that when thestone and work-holdingplate are revolved, the sections to be ground orfaced shall traverse said side of the stone. 1 would here remark thatthe stone or grinding-surface is preferably speeded at about two hundredand twenty-five rotations to five rotations of the work.

The work-holding-plate, and consequently the sections or work to beground or faced, are gradually fed toward the face of the grinding orfacing-stone to keep said sections in proper contact with the stoneduring the grindingorfacingoperation. Suitable means are provided forautomatically accomplishing this endwise motion of the work holdingplate, a preferable construction of feedingmechanism for the purposebeing shown in Figs. 1 and 2, wherein shaft H, a suitable distance atthe rear of the work-holding-plate is intergeared, as atH, with ahorizontal shaft J that is shown arranged a suitable distance above andin the same vertical plane with shaft H and supported by uprightbrackets or arms J J the one whereof J is rigid with a standard it atthe rear of the work-holdingplate and the other J being rigid with astandard H located still farther rearward of the work-holding-plate.

Shaft J, at its outer end, is provided with a crank-Wheel or disk Jprovided with a wrist-pin J to which, as will hereinafter appear, isoperatively connected, a pawl or ratchet, J (see also Fig. 11) thatengages a ratchet-wheel K operatively mounted upon a feed-screw, K, thatextends, through a correspondingly-threaded hole in arm or bracket Jinto the outer end of shaft H, the arrange ment of parts being such thatsaid screw, by the mechanism operatively connecting it with shaft H,shall be turned so as to feed shaft H, and the work-holder borne by saidshaft, toward the grinding or facing-stone or substance.

Pawl or ratchet J is pivoted to an arm, J loosely mounted upon the hubof ratchetwheel K, and arm J, by means of a link J is operativelyconnected with the wrist-pin J of crank J said link being slidablymounted upon the wrist-pin to accommodate the movement of the pawl orratchet with the ratchet-wheeland feed-screw during the feedingoperation.

Feed-screw K is operatively connected with a shaft H preferably in thefollowing manner: Said shaft (see also Fig. 10) is bored centrally atits outer end, as at W, (see Fig. 10) the inner portion of which bore isengaged by a collar L rigidly mounted, preferably by means of a pin L,upon the reduced unthreaded inner end of the feed-screw. The outerportion of bore h in the shaft is enlarged diametrically, as shown, saidenlarged portion of the bore being screw-threaded and engaged by aretaining-screw Mthat is shown engaging shoulder it formed by theenlargement of the bore in the shaft at the outer end of collar L andengages and holds collarL in engagement with the unthreaded portion ofhole h The retaining-screw extends somewhat outside of the bore in theshaft, and has mounted thereon a lock-nut m that is tightened againstthe end of the shaft and locks the retaining-screw in position withinthe enlarged portion of bore 77. in the shaft. The retaining-screw isloosely mounted upon the feed-screw, the portion of the feed-screw uponwhich screw M is mounted being plain or unthreaded, as shown in Figs. 2and 10.

By the construction just described, it will be observed that thefeed-screw is operatively connected with the shaft in such a manner thatthe shaft and the work-holding-plate borne thereby are moved endwise inthe one direction or the other according as the feedscrew is turned inthe one direction or the other. The feed-screw, in the case illustrated,is provided with a left-handed thread. Hence shaft H and the memberscarried thereby are fed in the direction of the grinding or facing-stoneby turning said screw to the left and are farther separated from saidstone by turning the screw to the right.

The feed-screw, at its outer end, is pro- 1 vided with a hand-wheel 70whereby the screw can be turned in the direction to separate thework-holding-plate from the grinding or facing-stone.

Having described the mechanism whereby the knife-sections or work to beground or faced are automatically fed toward the grinding or facingsurface during the grinding or facing operation, I will next refer tothe manner of feeding the knife-sections to the workholding-plate andthe mechanism whereby the knife-sections, upon the completion of thegrinding or facing operation, are automatically discharged from thepockets in said plate, and referring, first, to the manner of feeding,the knife-sections to the work-holding-plate, I would remark that theknife-sections are placed in a hopper, N, suitably supported at the topand forward of the work-holding plate. The hopper, as shown in Fig. 1,is arranged somewhat obliquely to a line extending parallel with theaxis of shaft H, and declines toward the work-holding-plate as shown inFig. 2. The knife-sections to be ground or faced (several of which areshown in the hopper at W in Fig. 2) are placed in the hopper in anupright position, and descends down the hopper by gravity in to thepockets of plate I, the location of the discharging-end of the hopperbeing such relative to the location of the. pockets in the plate, thatthe empty pockets receive a section as they pass the discharging-end ofthe hopper during the rotation of the work-holding-plate.

I The hopper is preferably supported by an upright arm or post, n, thatis removably secured, by means of set-screws n, withinan arm P of athree-armed casting or collar P that is loosely mounted upon shaft H atthe face of the work-holding-plate, member P be ing held from endwisedisplacement bymeans of a collar fixed upon the shaft at the end ofmember P opposite to the .location of the work-holding-pla-te. An arm Pof said member P projects downwardly and embraces, and is securedpreferably by means of set-screws, to a post or support Q suitablysupported. The remaining arm P of member P projects laterally in ahorizontal or approximately horizontal plane, and embraces an arm R thatis adjustable endwise of arm P of member P and is'secured to member P bymeans of set-. screws R.

Arm R extends somewhat beyond the edge of the work-holding-plate, and atthe edge of said plate extends laterally and somewhat rearwardly of theplate, as at 1* (see Figs. 1 and 2) and said laterally andrearwardly-projecting member 1" of arm R, at its free end, and at therear side of plate I, has adj ustably and rigidly mounted thereon aninwardly proj ectin g arm 1*, to the inner extremity whereof is secureda depending incline r hereinafter referred to.

A hole I (see Fig. 6) extends through the plates I at eachwork-holding-pocket and preferably centrally of the respective pocket,the meeting edges of plates 1 being shown cut away, as at 1 (see Fig. 8)to form said holes. Adapted to enter holes I are pins S, that aresupported in any suitable manner, a preferable construction it eingshown in Fig. 5, wherein said pins are operatively connected withsprings, S, that are suitably secured to the back side of thework-holding-plate. The arrangement of parts and the trend of incline rare such that said pins or the portion of the springs connected with thepins shall, during the rotation of the work-holding plate, engage theaforesaid incline, and, by the latter, be actuated inwardly, causing therespective pin to enter the respective hole in the work-holding-plate,and push the ground or faced knife-section out of the pocket containingthe section, and the pocket thatis thus emptied will again be occupiedbyan unground knife-section when said pocket again comes opposite thedischarging-end of the feed-hopper during the rotation of the worktheattendant has to do is to keep the feed- Ihopper supplied withknife-sections, and it post Q, at its lower extremity, terminates in asliding-plate orblock, Q, that is adapted to slide endwise of ways orguides Q rigidly secured to the floor of the shop and arranged parallelwith shaft II. Of course, the gears tablishing operative connectionbetween shaft H and shafts G and J, are connected with shaft H by thewell known means of groove and feather, and the grooves k (see Figs. 2and 10) in the shaft are of such length as to accommodate the endwisemovement of the shaft during the feeding operation hereinbeforedescribed. 1 In other words, said gears are both operatively andslidably mounted upon the shaft.

What I claim is-- 1. In a grinding or facing-machine, the combinationwith a rotating shaft and a chuck operatively mounted upon said shaftand bearing or adapted tobear the grinding or facing surface, of anothersuitably driven shaft ar ranged parallel with and a suitable distanceforward of the ch uck-carrying-shaft, and having a work-holding-plateoperatively mounted thereon, said work-holding-plate being provided withpockets for receiving the work to be ground or faced, suitable means forfeed: ing the work-holding-plate toward the grinding or facing surfaceduring the facing or grinding operation, and mechanism operativelyconnected with one of said rotating shafts for actuating thefeeding-device, substantially as set forth.

2. In a facingor grinding-machine, the combination with a rotating shaftprovided with a chuck bearing or adapted to bear the grinding or facing,surface another rotating shaft arranged parallel with and a suitabledistance forward of the chuck-bearing-shaft, said forward shaft beingprovided with a work-holding-plate having pockets for receiving the workto be ground or faced, a feedscrew for actuating the shaft bearing thework-carrying-plate for feeding said plate toward the grinding or facingsurface during the facing or grinding operation, suitable means forturning said screw to efiect said feed, and mechanism operativelyconnected with the aforesaid plate-bearing-shaft for actuating saidscrew-turning means, substantially as set forth.

3. Inafacing or grinding-machine, the combination withachuck-bearing-shaft the chuck whereof carried or is adapted to bear thegrinding or facingsurface, and another suitably driven shaft bearing thework-holdingplate and arranged parallel with and located that aremounted upon and employed in esa suitable distance forward of thechuckbearing-shaft, the work-holding-plate being provided with pocketsfor receiving the work to be ground or faced and saidplate-bearing-shaft being adapted to move endwise, of a screw foractuating said plate-bearingshaft toward the facing or grinding surfaceduring the grinding or facing operation, a correspondingly threadedbearing for the screw, a ratchet-wheel operatively mounted upon thescrew, a crank-shaft operatively connected with the shaft that bears theworkholding-plate, and a pawl or ratchet operatively connected with thecrank of the crankshaft, said pawl or ratchet engaging and being adaptedto actuate the ratchet-wheel in the direction to cause the work to befed and properly held against the grinding or facing surface during thefacing or grinding operation, substantially as set forth. 1

4. In afacing or grinding-machine, the combination with a suitablydriven shaft bearing a chuck for carrying the grinding or facingsurface, and another suitably driven shaft bearing thework-holding-plate and movable endwise, of suitable means forautomatically actuating said longitudinally movable shaft toward thegrinding or facing surface during the facing or grinding operation, afeed-hopper supported from said longitudinally movable shaft in front ofthe face of the workholding-plate, said hopper being adapted to receiveand deliver the work to be faced or ground to said plate and beingmovable with the supporting shaft and work-holding-plate, substantiallyas set forth.

5. In a facing or grinding-machine, the combination with a suitablydriven shaft bearing a chuck for carrying the grinding or facing surfaceand another suitably driven shaft bearing the work-holding-plate andmovable endwise, of suitable means for automatically actuating saidlongitudinally movable shaft toward the grinding or facing surfaceduring the facing or grinding operation, and other means for actuatingsaid shaft in the opposite direction, substantially as set forth.

6. The combination of two shafts B and H intergeared and arrangedparallel with each other, the one shaft bearing a chuck for receivin gthe grinding or facing-surface and the other shaft bearing awork-holding plate provided with pockets for receiving the work to beground or faced and movable endwise to feed the work-holding-plate toand from the longitudinally movable shaft substantially as indicated,suitable mechanism for automatically turning said screw in the directionrequired to feed the work, and suitable means for turning the screw inthe opposite direction.

7. In a facing or grinding machine, the combination with a suitablydriven shaft bearing a chuck for carrying the grinding or facing surfaceand another suitably driven shaft bearing the work-holding-plate andmovable endwise, of suitable means for automatically actuating saidlongitudinally movable shaft toward the grinding or facing surfaceduring the facing or grinding operation, other means for actuating saidshaft in the opposite direction, and suitable means for automaticallyeffecting the discharge of the work from the work-holding-plate upon thecompletion of the grinding or facing operation, substantially as setforth. I

8. In a facing or grinding-machine, the combination with a suitablydriven shaft bearing a chuck for carrying the grinding or facing surfaceand another suitably driven shaft bearing the work-holding-plate andmovable endwise, of suitable means for automatically actuating saidlongitudinally movable shaft toward the grinding or facing surfaceduring the facing or grinding operation, other means for. actuating saidshaft in the opposite direction, and suitable means for automaticallyeffecting the discharge of the work from the work-holding-plate upon thecompletion of the grinding or facing operation, said discharging meansconsisting of pins extending into and movable in the work-holding-plate,suitable means acting to retain said pins in their normal or inoperativeposition and an incline r the location and trend whereof is such thatthe work-discharging pins shall, during the LEVI L. LAMB.

Witnesses:

G. H. DORER, GEO. BILLow, Jr.

